The worst part of this is, say you have no intent to make rehabilitating the color yellow your life goal, but you see it as the morally right thing to do.
Hard disagree. I love dogs and animals overall. The fact that I don't spend my whole life managing dog shelters which we can all agree is a morally right thing to do doesn't make me nor anybody else automatically evil. Maybe in that saved time I am a neurosurgeon or fireman.
Not doing so is morally not the best thing. To say it is "morally evil" is to say that morality is some binary. "Evil" isn't a term I would throw around so easily.
World is not binary, people even less so.